Which are the most numerous of the leukocytes quizlet?

Terms in this set (17)

  • neutrophil. most numerous leukocyte.
  • eosinophil, basophil, neutrophil. name the granulocytes.
  • red blood cell. also called an erythrocyte; anucleate formed element.
  • monocyte and neutrophil. name 2 actively phagocytic leukocytes.
  • monocyte and lymphocyte.
  • megakaryocyte.
  • formed elements.
  • eosinophil.

Which are more numerous leukocytes or erythrocytes?

White Blood Cells (Leukocytes) White blood cells are much less numerous than RBCs (5,000 – 10,000 WBCs/µL blood) with a RBC/WBC ratio of approximately 700:1.

Which is the least numerous leukocyte?

Basophils are the least common leukocytes, typically comprising less than one percent of the total leukocyte count. They are slightly smaller than neutrophils and eosinophils at 8–10 µm in diameter. The granules of basophils stain best with basic (alkaline) stains.

Which leukocyte kills parasitic infections in the body?

Eosinophils. They attack and kill parasites and cancer cells, and help with allergic responses.

What type of leukocyte can live for years?

memory cells
Although one type of leukocyte called memory cells can survive for years, most erythrocytes, leukocytes, and platelets normally live only a few hours to a few weeks.

Which of the leukocytes are the rarest in number?

Basophils are the rarest type of white blood cell, making up only 1% of the white blood cells found in a blood smear.

Which white blood cell fights viruses?

T cells: Also known as T-lymphocytes, these white blood cells help recognize and remove infection-causing cells. Natural killer cells: These cells are responsible for attacking and killing viral cells, as well as cancer cells.

Which type of leukocyte lives the longest?


  • Monocytes are the largest type of leukocyte and share phagocytosis duties with neutrophils.
  • They are slower to respond than neutrophils but are longer lasting, as they can renew their lysosomes for continued digestion.

Which WBC has maximum life span?

– Neutrophils are normally 10 – 12 micrometers in diameter, they make up 60% – 70% of all white blood cells. Function of neutrophils is that of a phagocyte. Life span- 12 hours. Thus, the option (B) is correct.

Which is not a leukocyte?

Megakaryocytes (the cells that produce platelets) and erythrocytes (red blood cells) are not formally considered to be leukocytes, but arise from the common myeloid progenitor cells that produce the other cellular components of blood.

Can viruses infect white blood cells?

Antibodies bind to viruses, marking them as invaders so that white blood cells can engulf and destroy them.

Do white cells fight viruses?

They all work together to protect you from germs and help you get better when you’re sick. The main parts of the immune system are: White blood cells: Serving as an army against harmful bacteria and viruses, white blood cells search for, attack and destroy germs to keep you healthy.

What leukocyte is the least common in the blood?

Basophils are the least common leukocytes, typically comprising less than one percent of the total leukocyte count. They are slightly smaller than neutrophils and eosinophils at 8-10 µ m in diameter.

What is the rarest leukocyte?

Basophils are the rarest type of leukocytes, making up less than 1 percent of your total leukocyte count. Their function is still unclear, but most scientists agree that they also release histamines and anti-clotting chemicals in response to wounds and potential infections/pathogens/antigens.

Which are the smallest leukocytes?

The neutrophil is the most ubiquitous leukocyte in a normal blood smear, with about one neutrophil for every 1000 red blood cells. They are the smallest in size of the granulocytes .

What causes elevated leukocytes?

Leukocytosis is a medical term used to describe an elevation in the number of white blood cells in the body and may have a variety of causes, including infection, inflammation, and allergic responses. Additional causes of leukocytosis may include stress, sickle cell anemia, and the use of certain medications.